Image 03024, Blue whale, blowhole of inquisitive adult, underwater view close up., Balaenoptera musculus, Phillip Colla, all rights reserved worldwide. Keywords: anatomy, animal, balaenoptera, balaenoptera musculus, balaenopteridae, baleine bleue, ballena azul, behavior, big, blow, blowhole, blue rorqual, blue whale, blue whales, breath, breathe, cetacea, cetacean, creature, endangered, endangered threatened species, enormous, exhale, great blue whale, great northern rorqual, huge, large, lungs, mammal, marine, marine mammal, musculus, mysticete, mysticeti, ocean, pacific, pacific ocean, respiration, rorqual, rorqual bleu, sea, sibbald's rorqual, spout, sulphur bottom whale, threatened, underwater, whale, whale anatomy, whale behavior, whale blow spout, whale blowhole, wild, wildlife.